The RAND_bytes function in libssh before 0.6.3, when forking is enabled, does not properly reset the state of the OpenSSL pseudo-random number generator (PRNG), which causes the state to be shared between children processes and allows local users to obtain sensitive information by leveraging a pid collision.
https://bugzilla.redhat.com/show_bug.cgi?id=1072191
http://www.ubuntu.com/usn/USN-2145-1
http://www.openwall.com/lists/oss-security/2014/03/05/1
http://www.libssh.org/2014/03/04/libssh-0-6-3-security-release/
http://www.debian.org/security/2014/dsa-2879
http://secunia.com/advisories/57407
http://lists.opensuse.org/opensuse-updates/2014-03/msg00040.html
http://lists.opensuse.org/opensuse-updates/2014-03/msg00036.html